Why some patches can not be installed ? I can find error 192 in log files :

2018/10/19 13:31:07 PatchManagementPremium D Patch kb4078407.exe (status 192) returned code 0 (Success)

Status 192 indicates that patch signature can not be verified.

Cause can be :

1.Some certificate are missing or not up to date, in this case following article may help   https://communities.bmc.com/docs/DOC-109195

2. Patch file is corrupted.
Verify the file size on \Master\data\Vision64Database\patches directory and compare it with size of same patch in patch group from BCM console(that will show the actual size of the patch)
If the size of the file in \Master\data\Vision64Database\patches is less (in few Kbs) than the actual size then, Check if the same patch can be downloaded manually with the browser on the master server.
If the manual download got failed, open the same patch file that is a few Kbs (from ..\Master\data\Vision64Database\patches) in the text editor(ex. notepad++), It should be an HTML file containing information of the tool that prevents the download of the patch.

Ex: When Zscaler proxy is preventing the download:

img src="https://login.zscalertwo.net:443/__zsig/NT3S0qvtDjcvJ" /></td></tr>
</tbody></table></div>
<table class="m_tbl" cellpadding="0" cellspacing="0" align="center">
<tbody><tr>
<td height="100" valign="top" style="position:relative;">
<div class="uq_cd">D22</div>
<!--locale en_US-->
<table id="en_US" width="100%" border="0" cellspacing="0" cellpadding="0">
<tbody><tr><td class="eu_h">
<i class="a_i"></i>
Sorry, you don't have permission to visit this site.
</td></tr>
<tr><td class="hr"><hr></td></tr>
<tr><td class="eu_co">
<b>Website blocked</b>
</td></tr>
<tr><td class="eu_co rsn">
Not allowed to access this file type
</td></tr>
<tr><td class="eu_co">
You tried to visit:<div class="eu_l"><a href="http://download.windowsupdate.com/c/msdownload/update/software/secu/2019/12/windows6.1-kb4530692-x64_511527c76fedbddc1a95b554300392f9b79f7193.msu">http://download.windowsupdate.com/c/msdownload/update/software/secu/2019/12/windows6.1-kb4...</a></div>
</td></tr><tr>
<td class="hr"><hr></td>
</tr>
<tr><td class="eu_co fo">

<tr><td class="eu_co st">
<span class="s_img"></span>
Your organization has selected Zscaler to protect you from internet threats.

In this case, the issue has to be checked with the proxy/security/network team in order to allow the download of the patches.
Once the download is allowed, please download one or two patches manually with the browser on the master server in order to be sure they are not blocked anymore.

Then In BCM console,
->  Delete this patch from your Patch Group (be sure to delete it from all patch group it may be assigned and to delete all languages for this patch).
->  Then add it again to your patch group
This will download the patches again.

3. If the download is allowed from the proxy/firewall and still the patches are getting downloaded with incorrect size in ..\Master\data\Vision64Database\patches ,then there might be a patch repository which has these corrupted patches stored already.

When a patch repository is set, this is how patch download works:
-> A patch is added to a patch group
-> The patch manager first checks if the patch exists in the local patch repository
-> If it does exist, it doesn't download it again from the internet

Hence, if the corrupted patches that are few KBs already existed in the patch repository then the master won't download them again and will keep using the corrupted patches.

Once this is identified, please perform the below steps to download the patches correctly:
 
-> Delete the corrupted patches from the local patch repository and ...\Master\data\Vision64Database\patches as well.
-> Remove the patches from the patch group.
-> Add the patches to the patch group again.
This time the patches should be downloaded completely.